Category:ESP32 HDK

4.2 Peripheral Pin Configurations

• https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
• https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_cn.pdf

GPIOs

• IO 34 ~ 39 Input Only
• GPIO 0 ~ 39
• All GPIO support interrrupts, PWM

2x UARTs

• UART0: IO1 / IO3
• UART1: IO9 / IO10
• UART2: IO17 / IO16

IIC

• Any GPIOs
• IO22 / IO21
• IO4 / IO13

General purpose SPI

• Any GPIOs
• HSPI & VSPI

4x Parallel SPI

• SPI = SPI1: overlay used by internal flash
• HSPI = SPI2: IO12/MISO IO13/MOSI IO14/CLK IO15/CS0, drive MicroSD?

• VSPI = SPI3: IO23/MOSI IO18/CLK IO5/CS0 IO19/MISO, drive LCD
• SPI4?

GPIO IO_MUX

GPIOs:

• 0~19 = 20 IOs
• 21 22 23
• 25 26 27
• 32 33
• 34 35 36 37 38 39 = Input Only
• https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_cn.pdf#spi - page 44
• Wrover - https://www.espressif.com/sites/default/files/documentation/esp32-wrover_datasheet_en.pdf
• https://i0.wp.com/randomnerdtutorials.com/wp-content/uploads/2018/08/esp32-pinout-chip-ESP-WROOM-32.png?ssl=1
• I2S - any GPIOs
• IO34-39

PIN	PIN NAME	Use	Wrover	UART	SPI	AD/DA
38	GPIO19	-	GPIO19	Soft_uart_tx	VSPI_MISO
36	GPIO23	-	GPIO23		VSPI_MOSI
35	GPIO18	-	GPIO18	Soft_uart_rx	VSPI_CLK
34	GPIO5	-	GPIO5		VSPI_CS0
33	SD1	Internal Flash	GPIO8
32	SD0	Internal Flash	GPIO7
31	SD_CLK	Internal Flash	GPIO6
30	SD_CMD	Internal Flash	GPIO11
29	SD3	Internal Flash	GPIO10	U1_TXD
28	SD2	Internal Flash	GPIO9	U1_RXD
27	GPIO17	-	GPIO17	U2_TXD
25	GPIO16	-	GPIO16	U2_RXD
24	GPIO4	-	GPIO4	-
21	GPIO15	-	GPIO15	-	HSPI_CS0
20	GPIO13	-	GPIO13	-	HSPI_MOSI
18	GPIO12	-	GPIO12	-	HSPI_MISO
17	GPIO14	-	GPIO14	-	HSPI_CLK
14	GPIO25	-	GPIO25	-	-	DAC1
15	GPIO26	-	GPIO26	-	-	DAC2
16	GPIO27	-	GPIO27	-	-

Reference

Pinout mapping

• 

  ESP32 Pinout mapping V1